CN103683659B - A kind of double acting heat and acoustic power generating system utilizing liquefied natural gas to burn - Google Patents
A kind of double acting heat and acoustic power generating system utilizing liquefied natural gas to burn Download PDFInfo
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Abstract
The double acting heat and acoustic power generating system utilizing liquefied natural gas to burn, comprises the hot sound generator unit of at least three groups, pre-heating system and combustion system; The the first room temperature heat exchanger often organizing the thermoacoustic engine of hot sound generator unit connects the first thermal buffer tube and cool end heat exchanger successively, and cool end heat exchanger is connected with the regenerator of the thermoacoustic engine of the hot sound generator unit of this group; Low temperature cold, from the heat absorption of system hypothermia heat exchanger, is passed to system cool end heat exchanger by liquefied natural gas, then by the heat that preheating heat exchanger recovery high-temperature flue gas carries, enters combustion system after completing preheating; Liquefied natural gas and fuel produce high-temperature flue gas in combustion chamber mixed combustion, and high-temperature flue gas and the heat exchange of system hot heat exchanger, enter preheating heat exchanger preheating liquefied natural gas after heat being passed to hot end heat exchanger; Compared with traditional single heat source electricity generation system, it makes full use of cold energy of liquefied natural gas and combustion product gases heat energy, improves energy utilization rate, and the raising of thermal source temperature ratio simultaneously significantly can improve generator performance.
Description
Technical field
The present invention relates to a kind of electricity generation system, particularly a kind of double acting heat and acoustic power generating system utilizing liquefied natural gas to burn.
Background technology
Liquefied natural gas is one of important energy of current China.As a kind of clean, efficient, convenient, safe energy, high with its calorific value, pollute less, accumulating is convenient etc., and feature becomes one of selectable high-grade energy of modern society.Main component due to natural gas is methane; with natural gas power; carbon dioxide and water is generated completely after burning; the discharge capacity of the pollutants such as carbon dioxide, sulfur dioxide, flue dust can be cut down significantly compared with generating electricity with coal power generation, oil; so it is good clean fuel, is conducive to protection of the environment and reduces municipal pollution.
Natural gas becomes liquid after degree of depth cooling, and under liquefied natural gas normal pressure, boiling temperature is-162 DEG C, because impurity becomes solid and is excluded, so liquefied natural gas purity is very high in liquefaction process.Liquefied natural gas is less than the natural gas of homogenous quantities 625 times, and required local use transported to by liquefied natural gas by available like this automobile, steamer easily.But, before being supplied to user to use, need liquefied natural gas to vaporize.Usual natural gas gasifier absorbs heat from extra large water and air, causes the waste of a large amount of high-grade cold energy.Liquefied natural gas standard gasification latent heat is about 510kJ/kg, and be warming up to 25 DEG C of room temperatures and absorb heat about 400kJ/kg, liquefied natural gas contains abundant cold energy as can be seen here.When prior art utilizes liquefied natural gas to generate electricity, first employing technology reclaims the cold energy of liquefied natural gas usually, then adopts gas turbine to generate electricity.A kind of method of recycling of cold energy of liquefied natural gas is the Rankine cycle method by direct expansion method or intermediate heat carrier, liquefied natural gas or the cooled Low Temperature Thermal carrier of the natural gas that is liquefied are absorbed heat from the normal temperature such as seawater or air thermal source, after forming gases at high pressure, adopts turbo-expander acting drive electrical generators to produce electric energy.Natural gas under normal temperature generates electricity through gas turbine again.CN201110050254.0 discloses another kind and utilizes the Stirling engine of liquefied natural gas and combustion turbine combined system, utilizes Stirling-electric hybrid that the cold energy generation of liquefied natural gas is used gas turbine power generation again in this system.These systems all make use of the utilization that two cover engines realize cold and hot Wen Yuan respectively, and system is very complicated, is unfavorable for practicality.
Similar with Stirling engine, traditional heat and acoustic power generating system also can only realize single heat source and utilize in single device, utilizes, therefore also cannot realize the utilization of cold energy of liquefied natural gas while cannot realizing high/low temperature thermal source; Fig. 1 is traditional double acting heat and acoustic power generating system structural representation, and this system comprises:
Linear electric generator 101; Described linear electric generator 101 is made up of cylinder, the expansion piston 112 that is placed in the compression piston 111 within described cylinder, the generator rotor 113 be connected with described compression piston 111, the electricity generator stator coil 114 being wound in generator rotor 113 periphery, the generator loading 115 be electrically connected with described electricity generator stator coil 114 and is connected to described generator rotor 113 other end;
Described first room temperature heat exchanger 102, regenerator 105, hot end heat exchanger 106, thermal buffer tube 107, second room temperature heat exchanger 108 and tube connector 109; Tube connector 109 connects next group double acting heat and acoustic power generating system;
When the heat that hot end heat exchanger 106 absorbs self-heat power forms temperature end, first room temperature heat exchanger 102 is released heat and is formed indoor temperature end, the temperature difference is defined like this at the two ends of regenerator 105, according to thermoacoustic effect, when regenerator reaches uniform temperature gradient, system just self-excitation starting of oscillation, by thermal energy Cheng Shenggong.Sound merit is first delivered to thermal buffer tube 107 and the second room temperature heat exchanger 108 of this group along the positive direction of temperature gradient, then the linear electric generator 101 of next group is delivered to by tube connector 109, a part of sound merit is changed into electric work, remaining sound merit is continued be delivered to next group first room temperature heat exchanger 102 and by regenerator 105 amplification sound merit, hand on successively, three group systems form loop, and every platform engine can reclaim the part sound merit of, is conducive to raising the efficiency.The piston that double acting is embodied in every platform generator plays the effect of compression piston, and another piston plays the effect of expansion piston, by regulating impedance, all can obtain higher conversion efficiency of thermoelectric and larger energy output.In the traditional double acting heat and acoustic power generating system shown in Fig. 1, cold energy use cannot be realized with low temperature cold source heat exchange simply by the first room temperature heat exchanger 102, because can cause a large amount of cold energy losses like this, generator also will be operated in low temperature environment simultaneously, and performance and reliability reduce greatly.In principle, in traditional double effect heat and acoustic power generating system, hot end heat exchanger 106 can be also cool end heat exchanger 104, and the cold energy being used for absorbing low-temperature heat source forms low-temperature end.Because regenerator two ends exist temperature gradient, cold energy also can change into sound merit and finally generate electricity.But because regenerator temperature gradient is little, systematic function is lower.Same, can not realize heat energy utilization simply by the first room temperature heat exchanger 102 with high temperature heat source heat exchange, because can cause a large amount of thermal losss like this, generator also will be operated in hot environment simultaneously, and performance and reliability reduce greatly.
Summary of the invention
The present invention is just based on some problems that above existing hot generation technology exists, a kind of novel double acting heat and acoustic power generating system utilizing liquid oxygen to burn is proposed, its advantage is, also use the cold energy of liquefied natural gas while single device make use of combustion of natural gas heat, the basis substantially not increasing system complexity significantly improves energy utilization rate.Due to the rising of regenerator two ends absolute temperature ratio, systematic function is also improved significantly than single heat source electricity generation system.Meanwhile, avoid generator operation in low temperature or hot environment by new structural design, both decreased the loss of energy, improve the reliability that capacity usage ratio turn improves generator.
Technical scheme of the present invention is as follows:
The double acting heat and acoustic power generating system utilizing liquefied natural gas to burn provided by the invention, it comprises the hot sound generator unit of at least three groups;
The hot sound generator unit of often group of described at least three group hot sound generator unit is by a linear electric generator 101 and a thermoacoustic engine composition; Described linear electric generator 101 is made up of cylinder, the compression piston 111 and expansion piston 112, the generator rotor 113 be connected with described compression piston 111 and expansion piston 112, the electricity generator stator coil 114 being wound in generator rotor 113 periphery that are placed in two ends in cylinder and the generator loading 115 that is electrically connected with described electricity generator stator coil 114; Thermoacoustic engine comprises the first room temperature heat exchanger 102, regenerator 105, hot end heat exchanger 106, second thermal buffer tube 107, second room temperature heat exchanger 108 and the tube connector 109 that are connected successively; The cylinder upper end often organizing the linear electric generator 101 of hot sound generator unit is connected by pipeline with the first room temperature heat exchanger 102 of the thermoacoustic engine of the hot sound generator unit of this group; The tube connector 109 of the thermoacoustic engine of this group hot sound generator unit is connected with next cylinder bottom organizing the linear electric generator 101 of hot sound generator unit; The second room temperature heat exchanger 108 that the thermoacoustic engine of hot sound generator unit is organized at cylinder bottom and the end of the linear electric generator 101 of the hot sound generator unit of first group is connected;
It is characterized in that, also comprise combustion system and liquefied natural gas and air preheating system; The first room temperature heat exchanger 102 often organizing the thermoacoustic engine of hot sound generator unit of described at least three group hot sound generator unit connects the first thermal buffer tube 103 and cool end heat exchanger 104 successively, and described cool end heat exchanger 104 is connected with the regenerator 105 of the thermoacoustic engine of the hot sound generator unit of this group;
Described combustion system is made up of combustion chamber 301, blower fan 302, natural gas pump 206 and flue gas exit pipe road 303; Natural gas via preheating heat exchanger 204 is transported to combustion chamber 301 by natural gas pump 206, air is conveyed into preheating heat exchanger 204 by blower fan 302 and enters combustion chamber 301 again, and air and natural gas burn in combustion chamber 301; Described combustion chamber 301 is exported and is connected with the hot end heat exchanger 106 of the thermoacoustic engine often organizing hot sound generator unit respectively by flue gas exit pipe road 303;
Described liquefied natural gas and air preheating system are made up of liquified natural gas storage tank 201, liquid natural air valve 202, liquified natural gas output channel 203, preheating heat exchanger 204, natural gas input channel 205, natural gas input channel valve 208, natural gas multi-purpose station pipeline 207; Liquified natural gas storage tank 201 is connected with the cool end heat exchanger 104 of the thermoacoustic engine often organizing hot sound generator unit with liquified natural gas output channel 203 respectively by liquid natural air valve 202; Low temperature cold is passed to cool end heat exchanger 104 by the liquid oxygen in liquified natural gas storage tank 201, and self endothermic gasification becomes natural gas and flowed out by cool end heat exchanger 104; The natural gas part flowing out cool end heat exchanger 104 is defeated by other users by natural gas multi-purpose station pipeline 207, and another part enters through natural gas input channel valve 208 flue gas preheating heat exchanger 204 and combustion chamber 301 discharged and carries out heat exchange; Air under normal temperature is conveyed into preheating heat exchanger 204 through blower fan 302; Flow out from preheating heat exchanger 204 after the thermal temperature of natural gas and air recovered flue gas respectively raises; Under the driving of natural gas pump 206, enter combustion chamber 301 from the high-temperature natural gas of preheating heat exchanger 204 outflow together with the high temperature air flowed out from preheating heat exchanger 204 to burn; The high-temperature flue gas that burning produces enters the hot end heat exchanger 106 of the thermoacoustic engine often organizing heat and acoustic power generating system respectively through flue gas exit pipe road 303, transfer heat to hot end heat exchanger 106; High-temperature flue gas enters preheating heat exchanger 204 after hot end heat exchanger 106 flows out, and carries out preheating to cryogenic natural gas and normal temperature air;
In above-mentioned flow process, the hot end heat exchanger 106 often organizing the thermoacoustic engine of heat and acoustic power generating system forms high temperature, cool end heat exchanger 104 forms low temperature, like this in the two ends formation temperature gradient of regenerator 105; When regenerator 105 reaches uniform temperature gradient, the double acting heat and acoustic power generating system just self-excitation starting of oscillation utilizing liquefied natural gas to burn, produces pressure oscillation, by thermal energy Cheng Shenggong in system; Through the compression piston 111 of linear electric generator 101 to the thermoacoustic engine feedback sound merit of heat and acoustic power generating system, this sound merit is delivered to regenerator by the first room temperature heat exchanger 102, first thermal buffer tube 103 and cool end heat exchanger 104; Under the effect of regenerator 105 two ends temperature gradient, this sound merit is exaggerated; Amplify the sound merit flowing out regenerator 105 is delivered to the linear electric generator 101 of next group expansion piston 112 through hot end heat exchanger 106, second thermal buffer tube 107, second room temperature heat exchanger 108 and tube connector 109, the expansion piston 111 promoting linear electric generator 101 moves, make permanent magnet 113 at coil 114 internal motion on the one hand, form the change of magnetic flux, thus complete the conversion of sound merit to electric work; Also make compression piston 111 move on the other hand, to next group thermoacoustic engine feedback sound merit, transmit successively and form circulation, the hot sound generator unit of at least three groups forms loop.
The linear electric generator 101 of cool end heat exchanger 104 with the hot sound generator unit of this group separates by the first room temperature heat exchanger 102 often organizing the thermoacoustic engine of hot sound generator unit of described at least three group hot sound generator unit and the first thermal buffer tube 103, to reduce cold energy loss, improve cold energy use rate, avoid linear electric generator in low temperature environment work.
The linear electric generator that hot end heat exchanger 106 and next are organized hot sound generator unit by the second room temperature heat exchanger 108 often organizing the thermoacoustic engine of hot sound generator unit of described at least three group hot sound generator unit and the second thermal buffer tube 107 separates, to reduce heat-energy losses, improve heat utilization rate, avoid linear electric generator in hot environment work.
Described natural gas input channel valve 208 regulates natural gas to enter the flow of combustion system, thus ensures that heat needed for hot end heat exchanger and cool end heat exchanger institute chilling requirement match.
The series connection of low-temperature liquefaction natural gas via liquid oxygen output channel 203 enters the cryogenic heat exchanger of thermoacoustic engine; In described combustion system, high-temperature flue gas enters the high-temperature heat-exchanging of thermoacoustic engine through flue gas exit pipe road 303 series connection; In the flowing direction: low-temperature liquefaction natural gas and high-temperature flue gas following current flow through cool end heat exchanger and the hot end heat exchanger of engine respectively, or low-temperature liquefaction natural gas and high-temperature flue gas adverse current flow through cool end heat exchanger and the hot end heat exchanger of engine respectively.
The double acting heat and acoustic power generating system utilizing liquefied natural gas to burn of the present invention can two covers or the above tandem working of two covers.
Advantage of the present invention is as follows: the cold energy also using liquefied natural gas make use of combustion of natural gas heat in single device while, and the basis substantially not increasing system complexity significantly improves energy utilization rate.Due to the rising of regenerator two ends absolute temperature ratio, systematic function is also improved significantly than single heat source electricity generation system.Meanwhile, avoid generator operation in low temperature or hot environment by new structural design, both decreased the loss of energy, improve the reliability that capacity usage ratio turn improves generator.
Accompanying drawing explanation
Fig. 1 is traditional double acting heat and acoustic power generating system structural representation;
Fig. 2 is a kind of double acting heat and acoustic power generating system (embodiment 1) structural representation simultaneously utilizing liquefied natural gas to burn of the present invention;
Fig. 3 is a kind of double acting heat and acoustic power generating system (embodiment 2) structural representation simultaneously utilizing liquefied natural gas to burn of the present invention;
Fig. 4 is a kind of double acting heat and acoustic power generating system (embodiment 3) structural representation simultaneously utilizing liquefied natural gas to burn of the present invention;
Fig. 5 is a kind of double acting heat and acoustic power generating system (embodiment 4) structural representation simultaneously utilizing liquefied natural gas to burn of the present invention;
Fig. 6 is a kind of double acting heat and acoustic power generating system (embodiment 5) structural representation simultaneously utilizing liquefied natural gas to burn of the present invention;
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
The double acting heat and acoustic power generating system utilizing liquefied natural gas to burn of the present invention, takes full advantage of high-temperature flue gas thermal source and low-temperature liquefaction natural gas low-temperature receiver, substantially increases energy utilization rate; And utilize the temperature ratio that can increase regenerator high/low temperature end while thermal source and low-temperature receiver, improve the ability of regenerator generation sound merit, increase the energy output of system.New structural design decreases cold energy and hot loss of energy, substantially increases the performance of double acting heat and acoustic power generating system.
Embodiment 1:
Fig. 2 is a kind of double acting heat and acoustic power generating system utilizing liquefied natural gas to burn, and it comprises: three groups of hot sound generator units, a liquefied natural gas and air preheating systems and a combustion system;
The hot sound generator unit of often group in three groups of hot sound generator units of the present embodiment is by a linear electric generator 101 and a thermoacoustic engine composition; Described linear electric generator 101 is made up of cylinder, the compression piston 111 and expansion piston 112, the generator rotor 113 be connected with described compression piston 111 and expansion piston 112, the electricity generator stator coil 114 being wound in generator rotor 113 periphery that are placed in two ends in cylinder and the generator loading 115 that is electrically connected with described electricity generator stator coil 114; Thermoacoustic engine comprises the first room temperature heat exchanger 102, first thermal buffer tube 103, cool end heat exchanger 104, regenerator 105, hot end heat exchanger 106, second thermal buffer tube 107, second room temperature heat exchanger 108 and the tube connector 109 that are connected successively; The cylinder upper end often organizing the linear electric generator 101 of hot sound generator unit is connected by pipeline with the first room temperature heat exchanger 102 of the thermoacoustic engine of the hot sound generator unit of this group; The tube connector 109 of the thermoacoustic engine of this group hot sound generator unit is connected with next cylinder bottom organizing the linear electric generator 101 of hot sound generator unit; The second room temperature heat exchanger 108 that the thermoacoustic engine of hot sound generator unit is organized at cylinder bottom and the end of the linear electric generator 101 of the hot sound generator unit of first group is connected; It is characterized in that, the the first room temperature heat exchanger 102 often organizing the thermoacoustic engine of hot sound generator unit connects the first thermal buffer tube 103 and cool end heat exchanger 104 successively, and described cool end heat exchanger 104 is connected with the regenerator 105 of the thermoacoustic engine of the hot sound generator unit of this group;
Described combustion system is made up of combustion chamber 301, blower fan 302, natural gas pump 206 and flue gas exit pipe road 303; Natural gas via preheating heat exchanger 204 is transported to combustion chamber 301 by natural gas pump 206, air is conveyed into preheating heat exchanger 204 by blower fan 302 and enters combustion chamber 301 again, and air and natural gas burn in combustion chamber 301; Described combustion chamber 301 is exported and is connected with the hot end heat exchanger 106 of the thermoacoustic engine often organizing hot sound generator unit respectively by flue gas exit pipe road 303;
Described liquefied natural gas and air preheating system are made up of liquified natural gas storage tank 201, liquid natural air valve 202, liquified natural gas output channel 203, preheating heat exchanger 204, natural gas input channel 205, natural gas input channel valve 208, natural gas multi-purpose station pipeline 207; Liquified natural gas storage tank 201 is connected with the cool end heat exchanger 104 of the thermoacoustic engine often organizing hot sound generator unit with liquified natural gas output channel 203 respectively by liquid natural air valve 202; Low temperature cold is passed to cool end heat exchanger 104 by the liquid oxygen in liquified natural gas storage tank 201, and self endothermic gasification becomes natural gas and flowed out by cool end heat exchanger 104; The natural gas part flowing out cool end heat exchanger 104 is defeated by other users by natural gas multi-purpose station pipeline 207, and another part enters through natural gas input channel valve 208 flue gas preheating heat exchanger 204 and combustion chamber 301 discharged and carries out heat exchange; Air under normal temperature is conveyed into preheating heat exchanger 204 through blower fan 302; Flow out from preheating heat exchanger 204 after the thermal temperature of natural gas and air recovered flue gas respectively raises; Under the driving of natural gas pump 206, enter combustion chamber 301 from the high-temperature natural gas of preheating heat exchanger 204 outflow together with the high temperature air flowed out from preheating heat exchanger 204 to burn; The high-temperature flue gas that burning produces enters the hot end heat exchanger 106 of the thermoacoustic engine often organizing heat and acoustic power generating system respectively through flue gas exit pipe road 303, transfer heat to hot end heat exchanger 106; High-temperature flue gas enters preheating heat exchanger 204 after hot end heat exchanger 106 flows out, and carries out preheating to cryogenic natural gas and normal temperature air;
In above-mentioned flow process, the hot end heat exchanger 106 often organizing the thermoacoustic engine of heat and acoustic power generating system forms high temperature, cool end heat exchanger 104 forms low temperature, like this in the two ends formation temperature gradient of regenerator 105; When regenerator 105 reaches uniform temperature gradient, the double acting heat and acoustic power generating system just self-excitation starting of oscillation utilizing liquefied natural gas to burn, produces pressure oscillation, by thermal energy Cheng Shenggong in system; Through the compression piston 111 of linear electric generator 101 to the thermoacoustic engine feedback sound merit of heat and acoustic power generating system, this sound merit is delivered to regenerator by the first room temperature heat exchanger 102, first thermal buffer tube 103 and cool end heat exchanger 104; Under the effect of regenerator 105 two ends temperature gradient, this sound merit is exaggerated; Amplify the sound merit flowing out regenerator 105 is delivered to the linear electric generator 101 of next group expansion piston 112 through hot end heat exchanger 106, second thermal buffer tube 107, second room temperature heat exchanger 108 and tube connector 109, the expansion piston 111 promoting linear electric generator 101 moves, make permanent magnet 113 at coil 114 internal motion on the one hand, form the change of magnetic flux, thus complete the conversion of sound merit to electric work; Also compression piston 111 is made to move on the other hand, to next group thermoacoustic engine feedback sound merit; Transmit successively and form circulation, three groups of hot sound generator units form loop.
Embodiment 2:
Fig. 3 is a kind of double acting heat and acoustic power generating system (embodiment 2) structural representation utilizing liquefied natural gas to burn of the present invention.The present embodiment is on the basis of embodiment 1, three groups of hot sound generator units are expanded to four groups, and combustion system and liquefied natural gas and air preheating system just simply add a road pipeline, improve the power density of system and overall energy output like this after structure simple change; The easy imagination, according to concrete need for electricity and dimensional requirement, can select many groups of more than four groups hot sound generator units.
Embodiment 3:
Fig. 4 is double acting heat and acoustic power generating system (embodiment 3) structural representation utilizing liquefied natural gas to burn of the present invention.The present embodiment is on the basis of embodiment 1, change the form of the cold hot end heat exchanger parallel heat exchanging of the thermoacoustic engine of group hot sound generator unit of three wherein into series connection heat exchange, namely the low temperature in liquefied natural gas pre-heating system and combustion system and high temperature fluid is equidirectional successively flows through cool and heat ends heat exchanger, heat exchange is carried out at preheating heat exchanger place after last group heat exchange, reduce and discharge flue-gas temperature and increase the oxygen temperature entering combustion chamber, save fuel; Because in every platform thermoacoustic engine, high-temperature heat-exchanging temperature reduces successively, low-temperature heat exchange actuator temperature raises successively, and the temperature difference at regenerator two ends is reduced successively, and the energy output of generator also reduces successively, according to different needs for electricity, different energy output can be applied.
Embodiment 4:
Fig. 5 is a kind of double acting heat and acoustic power generating system (embodiment 4) structural representation utilizing liquefied natural gas to burn of the present invention.The present embodiment is on the basis of embodiment 1, flow through each heat exchanger and become by equidirectional successively for high/low temperature fluid and in the other direction flow through each heat exchanger, the difference of the regenerator two ends temperature difference in every platform engine can be reduced like this, make the energy output of three generators as far as possible close, to meet corresponding need for electricity; Change the flowing of cold fluid and hot fluid in preheating heat exchanger 204 into countercurrent flow by following current form simultaneously, reach better heat transfer effect.
Embodiment 5:
Fig. 6 is a kind of double acting heat and acoustic power generating system (embodiment 5) structural representation utilizing liquefied natural gas to burn of the present invention, the present embodiment is on the basis of embodiment 1, two cover double acting heat and acoustic power generating systems are cascaded, adopt same road liquefied natural gas and air preheating system and combustion system, when cryogenic natural gas and high-temperature flue gas are after the double acting heat and acoustic power generating system heat exchange that first set utilizes liquefied natural gas to burn, flow through the double acting heat and acoustic power generating system heat exchange that the second cover utilizes liquefied natural gas to burn again, finally by preheating heat exchanger, the fluid temperature difference in preheating heat exchanger can be reduced like this, reduce energy loss, utilize cold and hot Wen Yuan more fully, due to the engine regenerator two ends temperature difference of the double acting heat and acoustic power generating system that the second engine regenerator two ends temperature difference of overlapping in the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn utilizes liquefied natural gas to burn lower than first set, so the second energy output overlapping the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn is less than the double acting heat and acoustic power generating system that first set utilizes liquefied natural gas to burn.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. utilize the double acting heat and acoustic power generating system that liquefied natural gas burns, it comprises the hot sound generator unit of at least three groups;
The hot sound generator unit of often group of described at least three group hot sound generator unit is by a linear electric generator (101) and a thermoacoustic engine composition; Described linear electric generator (101) by cylinder, the compression piston (111) and the expansion piston (112) that are placed in two ends in cylinder, the generator rotor (113) be connected with described compression piston (111) and expansion piston (112), be wound in the peripheral electricity generator stator coil (114) of generator rotor (113) and the generator loading (115) that is electrically connected with described electricity generator stator coil (114) forms; Thermoacoustic engine comprises the first room temperature heat exchanger (102), regenerator (105), hot end heat exchanger (106), the second thermal buffer tube (107), the second room temperature heat exchanger (108) and the tube connector (109) that are connected successively; Often organize the cylinder upper end of the linear electric generator (101) of hot sound generator unit to be connected by pipeline with the first room temperature heat exchanger (102) of the thermoacoustic engine of the hot sound generator unit of this group; The cylinder bottom that tube connector (109) and next of the thermoacoustic engine of this group hot sound generator unit organize the linear electric generator (101) of hot sound generator unit is connected; The second room temperature heat exchanger (108) that the thermoacoustic engine of hot sound generator unit is organized at cylinder bottom and the end of the linear electric generator (101) of the hot sound generator unit of first group is connected;
It is characterized in that, also comprise combustion system and liquefied natural gas and air preheating system; The first room temperature heat exchanger (102) often organizing the thermoacoustic engine of hot sound generator unit of described at least three group hot sound generator unit connects the first thermal buffer tube (103) and cool end heat exchanger (104) successively, and described cool end heat exchanger (104) is connected with the regenerator (105) of the thermoacoustic engine of the hot sound generator unit of this group;
Described combustion system is made up of combustion chamber (301), blower fan (302), natural gas pump (206) and flue gas exit pipe road (303); Natural gas via preheating heat exchanger (204) is transported to combustion chamber (301) by natural gas pump (206), air is conveyed into preheating heat exchanger (204) by blower fan (302) and enters combustion chamber (301) again, and air and natural gas burn in combustion chamber (301); Described combustion chamber (301) outlet is connected with the hot end heat exchanger (106) of the thermoacoustic engine often organizing hot sound generator unit respectively by flue gas exit pipe road (303);
Described liquefied natural gas and air preheating system are made up of liquified natural gas storage tank (201), liquid natural air valve (202), liquified natural gas output channel (203), preheating heat exchanger (204), natural gas input channel (205), natural gas input channel valve (208), natural gas multi-purpose station pipeline (207); Liquified natural gas storage tank (201) is connected with the cool end heat exchanger (104) of the thermoacoustic engine often organizing hot sound generator unit with liquified natural gas output channel (203) respectively by liquid natural air valve (202); Low temperature cold is passed to cool end heat exchanger (104) by the liquid oxygen in liquified natural gas storage tank (201), and self endothermic gasification becomes natural gas and flowed out by cool end heat exchanger (104); The natural gas part flowing out cool end heat exchanger (104) is defeated by other users by natural gas multi-purpose station pipeline (207), and another part enters through natural gas input channel valve (208) flue gas preheating heat exchanger (204) and combustion chamber (301) discharged and carries out heat exchange; Air under normal temperature is conveyed into preheating heat exchanger (204) through blower fan (302); Flow out from preheating heat exchanger (204) after the thermal temperature of natural gas and air recovered flue gas respectively raises; The high-temperature natural gas flowed out from preheating heat exchanger (204) enters combustion chamber (301) and burns under the driving of natural gas pump (206) together with the high temperature air flowed out from preheating heat exchanger (204); The high-temperature flue gas that burning produces enters the hot end heat exchanger (106) of the thermoacoustic engine often organizing heat and acoustic power generating system respectively through flue gas exit pipe road (303), transfer heat to hot end heat exchanger (106); High-temperature flue gas enters preheating heat exchanger (204) after hot end heat exchanger (106) flows out, and carries out preheating to cryogenic natural gas and normal temperature air;
The hot end heat exchanger (106) often organizing the thermoacoustic engine of heat and acoustic power generating system forms high temperature, cool end heat exchanger (104) forms low temperature, like this in the two ends formation temperature gradient of regenerator (105); When regenerator (105) reaches uniform temperature gradient, the double acting heat and acoustic power generating system just self-excitation starting of oscillation utilizing liquefied natural gas to burn, produces pressure oscillation, by thermal energy Cheng Shenggong in system; Compression piston (111) through linear electric generator (101) is to the thermoacoustic engine feedback sound merit of heat and acoustic power generating system, and this sound merit is delivered to regenerator by the first room temperature heat exchanger (102), the first thermal buffer tube (103) and cool end heat exchanger (104); Under the effect of regenerator (105) two ends temperature gradient, this sound merit is exaggerated; Amplify the sound merit flowing out regenerator (105) is delivered to the linear electric generator (101) of next group expansion piston (112) through hot end heat exchanger (106), the second thermal buffer tube (107), the second room temperature heat exchanger (108) and tube connector (109), promote expansion piston (111) motion of linear electric generator (101), make permanent magnet (113) at coil (114) internal motion on the one hand, form the change of magnetic flux, thus complete the conversion of sound merit to electric work; Also make compression piston (111) move on the other hand, to next group thermoacoustic engine feedback sound merit, transmit successively and form circulation, the hot sound generator unit of at least three groups forms loop.
2. by the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn described in claims 1, it is characterized in that, the linear electric generator (101) of cool end heat exchanger (104) with the hot sound generator unit of this group separates by the first room temperature heat exchanger (102) often organizing the thermoacoustic engine of hot sound generator unit of described at least three group hot sound generator unit and the first thermal buffer tube (103), to reduce cold energy loss, improve cold energy use rate, avoid linear electric generator in low temperature environment work.
3. by the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn described in claims 1, it is characterized in that, the linear electric generator that hot end heat exchanger (106) and next organize hot sound generator unit separates by the second room temperature heat exchanger (108) often organizing the thermoacoustic engine of hot sound generator unit of described at least three group hot sound generator unit and the second thermal buffer tube (107), to reduce heat-energy losses, improve heat utilization rate, avoid linear electric generator in hot environment work.
4. the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn according to claims 1, it is characterized in that, described natural gas input channel valve (208) regulates natural gas to enter the flow of combustion system, thus ensures that heat needed for hot end heat exchanger and cool end heat exchanger institute chilling requirement match.
5. according to the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn described in claims 1, it is characterized in that, low-temperature liquefaction natural gas via liquid oxygen output channel (203) series connection enters the cryogenic heat exchanger of thermoacoustic engine; In described combustion system, high-temperature flue gas enters the high-temperature heat-exchanging of thermoacoustic engine through flue gas exit pipe road (303) series connection; In the flowing direction: low-temperature liquefaction natural gas and high-temperature flue gas following current flow through cool end heat exchanger and the hot end heat exchanger of engine respectively, or low-temperature liquefaction natural gas and high-temperature flue gas adverse current flow through cool end heat exchanger and the hot end heat exchanger of engine respectively.
6. the double acting heat and acoustic power generating system utilizing liquefied natural gas to burn according to claims 1, the double acting heat and acoustic power generating system tandem working that utilize liquefied natural gas burn of its feature more than two covers or two covers.
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| CN103983007A (en) * | 2014-05-09 | 2014-08-13 | 广东万和新电气股份有限公司 | Gas-fired water heating device with generating set |
| CN109945543B (en) * | 2017-12-20 | 2020-10-30 | 中国科学院理化技术研究所 | Gas air source thermoacoustic heat pump system |
| CN110080905A (en) * | 2019-04-18 | 2019-08-02 | 杭州紫明冷链科技有限责任公司 | A kind of cold energy stepped utilization method based on thermo-acoustic technology |
| CN113137779B (en) * | 2020-01-18 | 2023-05-23 | 中国科学院理化技术研究所 | Combined cooling heating and power system without moving parts |
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